Follow the advice below when using tile adhesive

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How much tile adhesive do I need?

Based on the formula of 1.8 kgs per 1mm depth per m2, you will need to allow a minimum 3mm bed of adhesive for bonding down the XPS insulation boards or heatstore tile backer boards to the sub-floor, 4mm coverage of the cable plus a minimum 1.5mm bed of adhesive to bond the tiles (total depth of adhesive = 8.5mm).

5m2

5m2 tiled area with insulation board

5m x 8.5mm x 1.8kg = 77kg

Total amount of adhesive

= 4 x 20kg bags

10m2

5m2 tiled area with insulation board

10m x 8.5mm x 1.8kg = 153kg

Total amount of adhesive

= 8 x 20kg bags

How much latex self levelling compound do I need?

This Depends on what floor finish you are having, if your having a tiled finish then you dont always need to latex the cables/mats, sometimes its easier to pour a thin bed of latex on them to hold them in position for when you come to tile it. If you are having a vinyl floor then you will need to totally embed the underfloor heating cables in latex, this will normally require at least 6mm of levelling compound.

√x

Based on the formula

1.67Kg/sqm x area(sqm)

x 6mm thickness divided by 20Kg

= number of bags

5m2

Example for a 5m2 area

1.67kg x 5m x 6mm = 50kg

Total amount of levelling compound

= 3 x 20kg bags

10m2

5m2 tiled area with insulation board

1.67kg x 10m x 6mm = 100kg

Total amount of levelling compound

= 5 x 20kg bags

Still unsure? Speak to our experts

Technical support: 01268 567016

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All our technical staff are fully qualified electricians and plumbers. We are here to offer expert advice on any issues you may have.